So I made a big skin chart in numbers. You basically only have to input the cards you have and the skins you have and the chart will calculate the essence left required to complete the rare, epic, or legendary skin along with the new skin card type of the one card system for a skin. There is also input for the opal skins (however you have to manually enter the cost, I couldn't find the cost of ones I already obtained) and along with calculating the essence left it will calculate the closest...
Posted: Jan 19, 2017